Tech PDF

BS

BS 1121-7:1948

Methods for the analysis of iron and steel. Tin in pig iron, plain carbon steels and certain low alloy steels
standard by BSI Group, 07/05/1948

BS

BS 1123:1943

Valves, gauges and other safety fittings for air receivers and compressed air instalations
standard by BSI Group, 07/16/1943